Prism Quilt Block

Cutting Requirements for 12″ finished block (scant 1/4″ seam allowance):

• Lilac: Cut TWO (2) 2 3/8″ squares. Then cut the squares diagonally, corner-to-corner, ONE (1) time. You’ll end up with TWO (2) triangles per square. (These will flank ONE (1) side, of the Lilac/Purple Half-Square Triangles, in the FOUR (4) corners of this quilt block when sewn together.)
• Lilac: Cut TWO (2) 2 7/8″ squares. On the back side of the squares draw a diagonal line, corner-to-corner, ONE (1) time. (These are paired with the Purple 2 7/8″ squares which will create FOUR (4) Half-Square Triangles. They’ll also be the FOUR (4) corners of this quilt block when they’re sewn together.)
• Lilac: Cut TWO (2) 2 3/8″ squares. On the back side of the squares draw a diagonal line, corner-to-corner, ONE (1) time. (These are paired with the Purple 2 3/8″ squares which will create FOUR (4) Half-Square Triangles. They’ll also be the center of this quilt block when they’re sewn together.)
• Lilac: Cut TWO (2) 4 3/8″ squares. On the back side of the squares draw a diagonal line, corner-to-corner, ONE (1) time. (These are paired with the Purple 4 3/8″ squares, which will create FOUR (4) Half-Square Triangles, as needed to sew this quilt block together.)
• Lilac: Cut FOUR (4) 1 7/8″ x 4 3/4″ rectangle. (These are paired with the Purple 1 7/8″ x 4 3/4″ rectangles as needed to sew this quilt block together.)
• Purple: Cut TWO (2) 2 3/8″ squares. Then cut the squares diagonally, corner-to-corner, ONE (1) time. You’ll end up with TWO (2) triangles per square. (These will flank ONE (1) side, of the Lilac/Purple Half-Square Triangles, in the FOUR (4) corners of this quilt block when sewn together.)
• Purple: Cut TWO (2) 2 7/8″ squares. (These are paired with the Lilac 2 7/8″ squares which will create FOUR (4) Half-Square Triangles. They’ll also be the FOUR (4) corners of this quilt block when they’re sewn together.)
• Purple: Cut TWO (2) 2 3/8″ squares. (These are paired with the Lilac 2 3/8″ squares which will create FOUR (4) Half-Square Triangles. They’ll also be the center of this quilt block when they’re sewn together.)
• Purple: Cut TWO (2) 4 3/8″ squares. (These are paired with the Lilac 4 3/8″ squares, which will create FOUR (4) Half-Square Triangles, as needed to sew this quilt block together.)
• Purple: Cut FOUR (4) 1 7/8″ x 4 3/4″ rectangle. (These are paired with the Lilac 1 7/8″ x
  4 3/4″ rectangles as needed to sew this quilt block together.)
• White: Cut TWO (2) 5 1/4″ squares. Then cut the squares diagonally, corner-to-corner, TWO (2) times. You’ll end up with FOUR (4) triangles per square. (These will flank both sides, of the larger Lilac/Purple Half-Square Triangles, as needed to sew this quilt block together.)

Prism Quilt Block Diagram

Prism Quilt

If you sew TWELVE (12) “Prism Quilt Blocks” you’ll end up with the quilt top pictured above. The size will be 36″ x 48″ finished, 36 1/2″ x 48 1/2″ unfinished.